Dual control adapter for press

ABSTRACT

Safety actuating device for a press. In a press, as a punch press, having a one-way clutch and a rod responsive to actuating means for operating said clutch to control the press, there is provided means interposed between actuating means and said rod to insure that the press will operate only in response to a force occurring in a predetermined manner and place. The rod is connected to a pivotally mounted lever whose operation is first resisted and then effected by successive operation of two linkages responding to energizing of a pressure cylinder. One linkage first, and normally, provides support means under said lever for positively preventing it from effecting movement of said rod. A pair of hand switches are each connected to a valve for energizing the cylinder when both of the operator&#39;&#39;s hands are on the respective switches. With the device of the invention in place and the actuating cylinder energized, the first operation is to pull the support means out of locking position and thereby to permit downward movement of said lever. This is followed immediately by engagement of said lever by said second linkage which draws the ever downward sufficiently to effect such movement of said pull rod as to energize the clutch and initiate one operation of the press.

United States Patent [191 Emrick Feb. 12, 1974 1 1 DUAL CONTROL ADAPTERFOR PRESS Homer R. Emrick, Kalamazoo, Mich.

[75] Inventor:

[52 US. 01. .Q 192/22, 192/131 R [51] Int. Cl Fl6p 3/18 [58] Field ofSearch 192/22, 131 R, 24

[56] References Cited UNITED STATES PATENTS 2,411,543 11/1946 Kann192/22 X 1,939,006 12/1933 Hawkins 192/24 X 1,851,171 3/1932 Goellner192/22 X 2,340,416 2/1944 Eason 192/24 X 2,496,793 2/1950 Herbers 192/22X 1,167,475 l/1916 Benjamin 192/131 Primary ExaminerAllan D. HerrmannAttorney, Agent, or Firm-Woodhams, Blanchard & Flynn [57 ABSTRACT Safetyactuating device for a press. In a press, as a punch press, having aone-way clutch and a rod responsive to actuating means for operatingsaid clutch to control the press, there is provided means interposedbetween actuating means and said rod to insure that the press willoperate only in response to a force occurring in a predetermined mannerand place. The rod is connected to a pivotally mounted lever whoseoperation is first resisted and then effected by succes sive operationof two linkages responding to energizing of a pressure cylinder. Onelinkage first, and normally, provides support meansunder said' lever forpositively preventing it from effecting movement of said rod. A pair ofhand switches are each connected 7 Claims, 2 Drawing Figures DUALCONTROL ADAPTER FOR PRESS FIELD OF THE INVENTION The invention relatesto safety actuators for presses and particularly to a type thereof whichpositively prevents actuation of the press starting mechanism until bothof the operators hands are on actuating switches. When so energized themechanism first withdraws a locking mechanism and then applies asuitable force to the operating rod.

BACKGROUND OF THE INVENTION IN the operation of punch, and similar,presses, it has long been customary to utilize a continuously operating,inertia storage, element such as a large flywheel which is then bysuitable means, such as a singlerevolution clutch, connected to thecrank or other mechanism by which the press is caused to operate. Inconnection therewith, it has long been customary to provide dual handcontrols to insure that both of the op'erators hands are in a safelocation prior to energization of the press to bring the dies thereoftogether. However, in spite of the long time during which this problemhas been recognized and the many devices which have been offered toimprove the level of safety encountered in connection withsuch presses,there has still remained the problem of positively insuring that theactuating mechanism of the press will not move unless anduntil it isappropriately energized. Particularly, in certain devices known in thepast there is provided merely an adjustable hook which upon actuationmoves to engage means connected to a pull rod for closing said clutch.

However, if in some manner this hook is accidentally caused to engageand operate the pull rod the machine will start. Thus, the press issubject to accidental starts and it is desirable to prevent this fromhappening.

Accordingly, the objects of the invention include: 1. To provide asafety press control which positively prevents actuation of the pressuntil the actuation which will be highly versatileand readily adaptableto use on and with presses and press control means of a wide range ofspecific designs.

Other objects and purposes of the invention will be apparent to personsacquainted with apparatus of this general type upon reading thefollowing specification and inspection of the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING In the drawing:

FIG. 1 is a somewhat schematic side view of atypical punch press showingthe location and arrangement with respect to the press of the safetycontrol device.

FIG. 2 is an elevation, partly schematic view, of a safety controldevice embodying the invention.

DETAILED DESCRIPTION Referring first to FIG. 1, there is shown in sideelevation a conventional punch press of the type for which the apparatusof the invention is particularly, though not exclusively, adapted and towhich reference is made to illustrate the details and application of theinvention.

The press shown in FIG. 1 comprises an upright frame 1 mounted in anyconvenient manner on a pedestal 2 and supporting a work table 3. Saidframe 1 carries bearing structure 4 for rotatably supporting a shaft 5to be driven in any convenient manner from one, here the leftward, endthereof and crank means such as an eccentric 9 is carried on the other,here the rightward, end thereof for vertically'reciprocating the ram 11by which in a conventional manner a suitable die, nOt shown, is causedto act on work held on the work table 3.

In the press shown, a shaft 6 is supported in a suitable bearing 7 andcarries at one, here the leftward, end thereof an inertia device 8, as aconventional flywheel.

A one revolution clutch 12 connects the shafts 5 and 6 upon appropriatemechanical actuation thereof by suitable trip means, as by the trip rod13. Power means such as an electric motor schematically indicated at 14is provided in any convenient manner for driving the shaft 6 at acontinuous and substantially uniform rate in any conventional manner.

A power means in the form of a pressure fluid cylinder 16 is provided tooperate appropriate mechanism,

in a translating device 17 through which actuation of the pressurecylinder 16 effects vertical actuation of the rod 13 and connecting ofthe clutch 12. The cylinder 16 is energized by opening of the valve 18which connects the cylinder 16 with a pressure line 19. The valve 18 isin many conventional embodiments, and here, operated by a solenoid 21which is in turn energized by a pair of serially connected hand switches22 and 23v through which the solenoid 21 is connected to a power sourceP.

Thus, actuation of both switches 22 and 23 will energize the solenoid 21by which the valve 18 is opened and the cylinder 16 energized/Energizingof said cylinder acts through the translating device 17 to actuate therod 13 by which the clutch 12 is closed and the I shaft 6 connected tothe'shaft 5. Energy stored in the inertia device 8 drives the shaft 5and thereby the eccentric 9 to operate the punch in the usual manner.

Release of one or both of the hand switches 22 and 23 de-energizes thesolenoid 21 and, also in a conventional manner, reverses the valve 18 bywhich to depressurize the cylinder 16. Means are provided for returningthe plunger 26 again upwardly when the air pressure has ceased tooperate. In the present embodiment same is indicated by a coil spring 20positioned between the cross head 27 and the cylinder 16 but other meansmay be provided-as desired such as the reversal of the air pressure onthe cylinder 16 when the solenoid 21 is de-energized. The apparatus -isnow returned to the beginning condition and is ready for an-. othercycle.

All of the foregoing is conventional and well known to the industry.Hence, further description thereof is believed unnecessary.

Turning now to the details of the present invention, same areillustrated in FIG.'2 and comprise the contents of the translatingdevice 17. The cylinder 16 carries and actuates a rod 26 and said latterhas rigidly mounted on its free end the connector or cross arm 27. Atone end of said cross arm, near the leftward end, there extends upwardlyand pivotally connected thereto a link 28. Immediately above said linkand related thereto in a manner to be described hereinafter is a powertransmittal member, here a lever 29, which is pivoted at one end 31 toframe means, as a plate 25, and connected at its other end to theabove-mentioned rod 13. A pin 32 projects outwardly from said lever 29and is positioned for engagement by a hook portion 33 which latter islocated at the upper end of the link 28. In' the starting positionshown, pin 32 is spaced a short distance below hook 33 to provide a lostmotion relationship as further dealt with below. The lower part of saidhook member is positioned substantially perpendicular to thelongitudinal extent of the link 28. Thus, for reasons further appearInghereinafter, the hook 33 will restrain upward movement of the pin 32 butthe pin 32 Will not restrain clockwise movement of the link 28 aroundthe pivot point 30. Suitable means, as a spring 35, are provided toconstantly urge a clockwise rotation of the lever 29 around its pivotpoint 31, the force thereof, however, being little if any more thanmerely enough to balance the weight of said lever.

Midway between the ends of the link 28 there is provided a cam 34 forcooperation with a pin 36. Said pin 36 is mounted on a verticallyadjustable plate 37. Said plate 37 is mounted in any convenient mannerfor vertical adjustment as desired, in this embodiment same beingprovided by the slot 38 in said plate receiving a screw and washer guidedevice 39 and vertically adjusted by means of a screw 41 threadedlymounted on a suitable lug 42 which is in turn mounted on the frame plate25. Suitable means, as a spring 43, constantly urges the link 28 in aleftward direction around its pivot point 30 for reasons appearinghereinafter.

A downwardly projecting lug 46 is also provided on the lever 29 and hasa generally flat surface 47, preferably provided in the form of aportion of a step 48 in the lower part of Said lug 46. A latch 49, hereof bellcrank shape, is pivotally affixed at 51 to the frame plate 25 andhas a notched portion 52 at its upper end shaped to mate with the step48. Means are provided for normally urging said arm 49 counterclockwisearound the pivot 51, in this case such means being the counterweightprovided by the arm 53.

A latch release link 54 is pivotally affixed at a point 56 to therightward end of the cross arm 27 and is provided with a hook 57arranged for normally engaging a pin 58 positioned on the bell crank insuch position as to limit the above-mentioned counterclockwise pivotalmovement of the arm 49. The lower edge, however, of said hook 57 is ofsuch contour that while it restrains upward movement of said pin 58 itwill not restrain clockwise movement of the lever 54 around said pivot56. There is further provided on said lever 54 a projection 60 defininga cam surface 61. A pin 59 is mounted on the frame plate 25 and projectstherefrom in a position to engage the cam surface 61 upon downwardmovement of the link 54 which engagement will cause clockwise rotationof said lever 54 about its pivot point 56.

OPERATION At the beginning of a cycle of operation, the motor 14 is, ofcourse, energized and the shaft 6 rotates. A

downward stroke of the rod 13 will close the clutch l2 and effect asingle revolution of the shaft and consequently a single operation ofthe punch. The objective 5 of the mechanism of the invention is,therefore, to effect a downward movement of the rod 13 when and asdesired to actuate the punch but to positively prevent such downwardmovement at any time other than during the operational cycle.

In this condition of the apparatus the upper end of the lever 49 andparticularly its surface 52 is received into the step 48 and thuspositively prevents the downward movement of the lever 29. Thispositively prevents downward movement of the rod 13 and hence preventsan accidental engagement of the clutch 12.

When the operator places both hands on the switches 22 and 23, whichare, of course, placed on the machine at suitable points according toknown practice, they energize the solenoid 21 to open the valve 18 andthereby supply pressure fluid to the upper end of the cylinder 16. Thispulls the cylinder rod 26 downwardly against the spring and therebymoves downwardly the cross head 27. Since the hook 57 is in contact withthe pin 58 and the hook 33 is spaced from the pin 32, the firstoperation will be to pull said pin 58 downwardly and thereby effect aclockwise rotation of the lever 49 which will remove the upper end ofsame'out from under the step 48. Immediately after this occurs, the hook33 moves downwardly sufficiently to engage the pin 32 and pull samedownwardly, thus pulling the rod 13 and closing the clutch 12. Thiseffects an operation of the punch in the normal manner.

It will be apparent that the lost motion space between the pin 32 andthe hook 33 is preferably as small as possible but it must be sufficientto insure full retraction of the latch 49 from under the transmittallever 29 before the hook 33 engages the pin 32.

In the meantime, the pin 59 acts against the cam 61 to move the upperend of the link 54 rightwardly and thereby release the pin 58. Thispermits the latch 49 to response to the counterwieght 53 and rotatecounterclockwise until it bears against the leftward side 46a of the lug46.

As the downward stroke continues, the pin 36 will bear against the cam34 to move the upper end of the link 28 rightwardly to release the pin32 and thereby permit the spring 35 to return the lever 29 upwardly.This will open the clutch 12 and make same ready for the next cycle ofoperation.

When the piston rod 26 reaches the bottom of its stroke, the air in thecylinder 16 may be automatically exhausted if desired. but in theembodiment shown same will be exhausted only when the operator releasesone or both of the switches 22 and 23 to de-energize the solenoid 21. Inwhatever manner this exhaust is effected, the air is exhausted at anappropriate point and the spring 20 returns the piston rod 26 andthereby the cross arm 27 upwardly. As this occurs, the cam 34 isreleasedfrom the pin 36 and the lever 28 responds to the spring 43 to return tothe position shown in FIG. 2 so as to be ready for the next cycle. Atthe same time, the cam 61 is released from the pin 59 and the lever 54responds to the spring 55 to return to the position shown in FIG. 2.Virtually simultaneously with this movement the surface 52 at the upperend of the latch 49 clears the corner between the surface 47 of the step48 and the surface 46a so as to permit the upper end of said latch toswing leftwardly to re-engage said surface 52 with the step 48 as shown.

The parts are now all back into the original condition and ready for thenext 'cyclewhich may be repeated in the same manner as that abovedescribed. 5

It will be recognized that a number of changes may be made from thespecific apparatus herein shown to illustrate the invention, whichchanges will all be well within the scope of the invention. As examplesof some of such changes the lever 29 may be arranged for verticalsliding motion rather than pivotal motion as shown and the latch 49 maybe caused to return to its latched position by the presence of a springrather than by the counterweight shown. The entire latch structureincluding particularly the latch 49, link 54, and parts asl5 sociatedtherewith, may be placed on the opposite side of the pull link 28 fromwhere it is shown in the drawing and the pin 58 may be spacedhorizontally a greater distance than shown from the pivot point 51 ifdesired to provide a more positive withdrawal of the latch from underthe lug 46. Further, the apparatus may be narrowedsomewhat by moving thelug 46, latch 49 and lever 54 all leftwardly closer to the pull link 28eliminating the counterweight 53 and replacing its function by acompression spring acting leftwardly against the upper end of the latchlever 49.

Other modifications and variations will be apparent to personsacquainted with apparatus of this general type but will be within thescope of the hereinafter appended claims excepting as said claims bytheir own terms clearly require otherwise.

The embodiments of the invention in which exclusive property orprivilege is claimed are defined as follows:

1. Operating means for a press utilizing a clutch operable bysubstantially rectilinear motion of a trip means, the combinationcomprising:

power means actuated by an operator for generating mechanical'rectilinear motion, said power means including a head member movable ina direction parallel to said direction of movement of said trip means inresponse to actuation of said power means; translating means adapted toreceive said rectilinear motion from said power means and apply same tosaid trip means, said translating means being normally held in a firstposition corresponding to the inoperative position of said clutch andmovable by said power means to a second position corresponding to theoperative position of said clutch; said translating means including apower transmitting member and means mounting same for movement with asubstantial component thereof in a direction parallel to the directionof movement of said trip means as same moves to operate said clutch;first link means operatively responsive to movement of said head memberand having a lost motion connection with said transmitting member; latchmeans engaging at least a portion of said translating means and normallyin a blocking position to positively hold said translating means in saidfirst position, said latch means including a latch and means normallyholding same in position for blocking movement of said powertransmitting member in a direction corresponding to closure of saidclutch; and release means actuated by said power means and effective towithdraw said latch means from said blocking position immediately priorto application of force by said power means to said translating means;

said release means including second link means responsive to movement ofsaid head member and connected for retracting said latch from saidblocking position in response to movement in said direction by said headmember, the lost motion relationship of said first link means beingsufficient to permit said latch to be retracted prior to connection ofsaid first link means to said transmitting member in power transmittingrelationship;

whereby upon the appearance of a force output by said power means saidlatch means will be withdrawn from said blocking position and forceapplied by said power means to said translating means will beeffectively applied to said trip means for actuation thereof.

2. The device of claim 1 wherein said power transmitting membercomprises a power transmittal arm pivotally mounted with respect to theframe of said press and arranged for movement having a substantialcomponent in a direction parallel to the direction of movement of ,saidtrip means as same moves to operate said clutch;

said head member comprising a cross head arranged in a positionsubstantiallyperpendicular to said direction and arranged for movementin said direction in response to energization of said power means;

said first link meanS including a first link pivoted to oneportion ofsaid cross head and having a lost motion relationship with a firstportion of said power transmittal arm at a location spaced from thepoint of pivoting thereof; and

said second link means including lost motion means for connecting saidcross head to said latch for moving same from said blocking position toa released position on movement of said cross head in the clutch closingdirection.

3. The device of claim 2 wherein said second link means is connected bya hookand pin arrangement to said latch and including also cam means fordisconnecting said hook and pin upon movement of said cross head througha selected distance in the clutch closing direction whereby said latchwill be free to return to its blocking position immediately upon returnby said power transmittal arm to its first position and regardless ofwhether said cross head has yet returned to the position occupied bysame at the beginning of the cycle.

4. In a power translation device for imposing a rectilinear operatingmotion' onto trip means adapted to operate the clutch of a punch pressin response to power means actuated by an operator and including a powertransmitting member arranged for rectilinear movement with at least asubstantial component thereof parallel to the direction of movement ofsaid trip means, and drive meansresponsive to actuation by said powermeans for actuating said clutch in response to output by said powermeans, the improvement in safety means therefor comprising:

a latch means normally positioned for blocking movement of said powertransmitting member from a first position corresponding to the opencondition of said clutch to a second position corresponding to theclosed condition of said clutch;

means constantly urging said latch means toward a blocking position;

link means responsive to movement of said power means for movement ofsaid latch means out of said blocking position; and

said drive means including lost motion linkage means connecting same tosaid power transmitting member, whereby energization of said power meanseffects movement first of said latch means out of said blocking positionfollowed by, upon run-out of said lost motion, movement of said powertransmitting member for effecting motion of said ,trip means in theclutch closing direction.

5. The device of claim 4 wherein said latch means includes a pivotedbell crank latch member wherein one arm thereof constitutes acounter-weight normally urging the other arm thereof into said blockingposition.

6. Operating means for a press utilizing a clutch operable bysubstantially rectilinear motion of a trip means, the combinationcomprising:

power means for generating mechanical rectilinear motion;

a pair of manually actuated switch means connected in series with oneanother and operably connected to said power means for permittingenergization thereof only when both of said switch means are closed,said pair of switch means being sufficiently spaced apart so as torequire an operator to utilize both hands so as to permit simultaneousmanual actuation of both of said switch means;

translating means adapted to receive said rectilinear motion from saidpower means and apply same to said trip means, said translating meansbeing normally held in a first position corresponding in the inoperativeposition of said clutch and movable by said power means to a secondposition corresponding to the operative position of said clutch;

linkage means operatively coacting between said power means and saidtranslating means for transmitting the rectilinear motion of said powermeans to said translating means, said linkage means including alost-motion connection for permitting a preselected amount ofrectilinear movement of said power means without causing a correspondingmovement of said translating means;

latch means engaging at least a portion of the translating means andnormally maintained same in a blocking position to positively hold saidtranslating means in said first position; and

release means coacting between said power means and said latch means andactuated during said selected amount of rectilinear motion forwithdrawing said latch means from said blocking position as said powermeans moves through said preselected amount of rectilinear movementprior to movement of said translating means by said linkage means;

whereby upon the appearance of a force output by said power means, saidlatch means will be initially withdrawn from said blocking positionprior to the application of force to said translating means by saidpower means, whereupon said power means will then apply force to saidtranslating means for moving said trip means to thereby actuate saidclutch.

7. Operating means according to claim 6, wherein said latch meansincludes a latch member mounted for pivotal movement and normally urgedinto blocking engagement with said translating means, and said releasemeans including a release member connected to said power means andmovable therewith, said release member being pivotal and having aportion thereof releasably engageable with said latch member.

1. Operating means for a press utilizing a clutch operable bysubstantially rectilinear motion of a trip means, the combinationcomprising: power means actuated by an operator for generatingmechanical rectilinear motion, said power means including a head membermovable in a direction parallel to said direction of movement of saidtrip means in response to actuation of said power means; translatingmeans adapted to receive said rectilinear motion from said power meansand apply same to said trip means, said translating means being normallyheld in a first position corresponding to the inoperative position ofsaid clutch and movable by said power means to a second positioncorresponding to the operative position of said clutch; said translatingmeans including a power transmitting member and means mounting same formovement with a substantial component thereof in a direction parallel tothe direction of movement of said trip means as same moves to operatesaid clutch; first link means operatively responsive to movement of saidhead member and having a lost motion connection with said transmittingmember; latch means engaging at least a portion of said translatingmeans and normally in a blocking position to positively hold saidtranslating means in said first position, said latch means including alatch and means normally holding same in position for blocking movementof said power transmitting member in a direction corresponding toclosure of said clutch; and release means actuated by said power meansand effective to withdraw said latch means from said blocking positionimmediately prior to application of force by said power means to saidtranslating means; said release means including second link meansresponsive to movement of said head member and connected for retractingsaid latch from said blocking position in response to movement in saiddirection by said head member, the lost motion relationship of saidfirst link means being sufficient to permit said latch to be retractedprior to connection of said first link means to said transmitting memberin power transmitting relationship; whereby upon the appearance of aforce output by said power means said latch means will be withdrawn fromsaid blocking position and force applied by said power means to saidtranslating means will be effectively applied to said trip means foractuation thereof.
 2. The device of claim 1 wherein said powertransmitting member comprises a power transmittal arm pivotally mountedwith respect to the frame of said press and arranged for movement havinga substantial component in a direction parallel to the direction ofmovement of said trip means as same moves to operate said clutch; saidhead member comprising a cross head arranged in a position substantiallyperpendicular to said direction and arranged for movement in saiddirection in response to energization of said power means; said firstlink meanS including a first link pivoted to one portion of said crosshead and having a lost motion relationship with a first portion of saidpower transmittal arm at a location spaced from the point of pivotingthereof; and said second link means including lost motion means forconnecting said cross head to said latch for moving same from saidblocking position to a released position on movement of said cross headin the clutch closing direction.
 3. The device of claim 2 wherein saidsecond link means is connected by a hook and pin arrangement to saidlatch and including also cam means for disconnecting said hook and pinupon movement of said cross head through a selected distance in theclutch closing direction whereby said latch will be free to return toits blocking position immediately upon return by said power transmittalarm to its first position and regardless of whether said cross head hasyet returned to the position occupied by same at the beginning of thecycle.
 4. In a power translation device for imposing a rectilinearoperating motion onto trip means adapted to operate the clutch of apunch press in response to power means actuated by an operator andincluding a power transmitting member arranged for rectilinear movementwith at least a substantial component thereof parallel to the directionof movement of said trip means, and drive means responsive to actuationby said power means for actuating said clutch in response to output bysaid power means, the improvement in safety means therefor comprising: alatch means normally positioned for blocking movement of said powertransmitting member from a first position corresponding to the opencondition of said clutch to a second position corresponding to theclosed condition of said clutch; means constantly urging said latchmeans toward a blocking position; link means responsive to movement ofsaid power means for movement of said latch means out of said blockingposition; and said drive means including lost motion linkage meansconnecting same to said power transmitting member, whereby energizationof said power means effects movement first of said latch means out ofsaid blocking position followed by, upon run-out of said lost motion,movement of said power transmitting member for effecting motion of saidtrip means in the clutch closing direction.
 5. The device of claim 4wherein said latch means includes a pivoted bell crank latch memberwherein one arm thereof constitutes a counter-weight normally urging theother arm thereof into said blocking position.
 6. Operating means for apress utilizing a clutch operable by substantially rectilinear motion ofa trip means, the combination comprising: power means for generatingmechanical rectilinear motion; a pair of manually actuated switch meansconnected in series with one another and operably connected to saidpower means for permitting energization thereof only when both of saidswitch means are closed, said pair of switch means being sufficientlyspaced apart so as to require an operator to utilize both hands so as topermit simultaneous manual actuation of both of said switch means;translating means adapted to receive said rectilinear motion from saidpower means and apply same to said trip means, said translating meansbeing normally held in a first position corresponding in the inoperativeposition of said clutch and movable by said power means to a secondposition corresponding to the operative position of said clutch; linkagemeans operatively coacting between said power means and said translatingmeans for transmitting the rectilinear motion of said power means tosaid translating means, said linkage means including a lost-motionconnection for permitting a preselected amount of rectilinear movementof said power means without causing a corresponding movement of saidtranslating means; latch means engaging at least a portion of thetranslating means and normally maintained same in a blocking position topositively hold said translating means in said first position; andrelease means coacting between said power mEans and said latch means andactuated during said selected amount of rectilinear motion forwithdrawing said latch means from said blocking position as said powermeans moves through said preselected amount of rectilinear movementprior to movement of said translating means by said linkage means;whereby upon the appearance of a force output by said power means, saidlatch means will be initially withdrawn from said blocking positionprior to the application of force to said translating means by saidpower means, whereupon said power means will then apply force to saidtranslating means for moving said trip means to thereby actuate saidclutch.
 7. Operating means according to claim 6, wherein said latchmeans includes a latch member mounted for pivotal movement and normallyurged into blocking engagement with said translating means, and saidrelease means including a release member connected to said power meansand movable therewith, said release member being pivotal and having aportion thereof releasably engageable with said latch member.